Can't really tell what those rooms have, the floor had carpet.
The dealer where my son and I heard the Salon2 in SF two months ago, only had one chair as I remember and four wall panels along the two side walls, with each panel slightly higher than the previous one. And a small defuser on the ceiling. So there was much less in that room than my current LR. But the Salons were quite far from the walls, much as I would have placed them, the sound was superb.
I've also been in audio rooms that were way too live. A local dealer had a HT setup using Thiel speakers and at first the sound was very good, with nice open airy highs. But after awhile ear fatigue started to set in.